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Research Articles

Synthesis, characterization and ethanol vapor sensing performance of SnO2/Graphene composite film

Authors:

M.T.V.P. Jayaweera ,

University of Colombo, LK
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R.C.L. De Silva,

Industrial Technology Institute, LK
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I.R.M. Kottegoda,

Industrial Technology Institute, LK
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S.R.D. Rosa

University of Colombo, LK
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Abstract

High performing sensor consisting of SnO2/Gn nanocomposite was fabricated using a novel one-step in-situ sonochemical method. The reducing properties of SnCl2 was used to reduce graphite oxide (GO) so that SnCl2 could be transformed to SnO2 on the basal plane of graphene. The combined characterizations including X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier Transformed Infra-Red spectroscopic data (FTIR) indicated the successful formation of SnO2/Gn composites. Current-voltage (I-V) characteristics of the gas sensor showed ideal ohmic behavior having low resistance. To demonstrate the product on sensing application, gas sensors were fabricated using SnO2/Gn composites and used in detecting ethanol vapor at room temperature (27°C).The results indicate that the SnO2/Gn composite exhibits a considerably high sensing performance of 17.54% response at 150 ppm ethanol vapor, rapid response and reproducibility. Furthermore, the performance of the gas sensor based on SnO2/Gn is very stable for a long period of time under normal operating conditions. Therefore, it is suggested that SnO2/Gn can be considered as an excellent sensing material which also has a potential for wider range of applications on sensors.

How to Cite: Jayaweera, M.T.V.P. et al., (2015). Synthesis, characterization and ethanol vapor sensing performance of SnO2/Graphene composite film. Sri Lankan Journal of Physics. 15, pp.1–10. DOI: http://doi.org/10.4038/sljp.v15i0.6345
Published on 26 Jan 2015.
Peer Reviewed

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